@article{chelliapan_wilby_sallis_2011,  title={Effect of hydraulic retention time on up-flow anaerobic stage reactor performance at constant loading in the presence of antibiotic tylosin},  volume={28},  ISSN={0104-6632},  url={https://doi.org/10.1590/S0104-66322011000100007},  DOI={10.1590/S0104-66322011000100007},  number={1},  journal={Brazilian Journal of Chemical Engineering},  publisher={Brazilian Society of Chemical Engineering},  author={Chelliapan, S. and Wilby, T. and Sallis, P. J.},  year={2011},  month={Jan},  pages={51–61} }